Thornton Boys Basketball (TBB) is a developmental youth basketball league that serves the north metro area. Registrants may range from 6-17 years of age as of the Sept. 1 cut-off date.

TBB's primary goal is to provide an atmosphere where players learn the fundamental skills and rules of basketball.

In addition, strong emphasis is placed on athletic conditioning, discipline, sacrifice, sportsmanship, respect for others: teammates, coaches, TBB administrators, referees, and spectators, as well as personal and school property.